I seldom need an air compressor but I have one of these in every vehicle.
Clicky Have two in your camper if you like as they take up very little space. In my 52 years of marriage the wife and I have full timed around 24 years due to my work and I can only recall several times I needed air. For flat tires we have Road side service, however in an emergency I can change a tire.
Usually some nice person will stop to help and I tip them accordingly.
EDIT to make it clear that this if an EMERGENCY air compressor and isn't designed for full time use.